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WO2006121289A1 - Procede d'estimation de l'etat de charge d'une batterie pour vehicule electrique hybride - Google Patents

Procede d'estimation de l'etat de charge d'une batterie pour vehicule electrique hybride Download PDF

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Publication number
WO2006121289A1
WO2006121289A1 PCT/KR2006/001749 KR2006001749W WO2006121289A1 WO 2006121289 A1 WO2006121289 A1 WO 2006121289A1 KR 2006001749 W KR2006001749 W KR 2006001749W WO 2006121289 A1 WO2006121289 A1 WO 2006121289A1
Authority
WO
WIPO (PCT)
Prior art keywords
charge
state
battery
capacity
open circuit
Prior art date
Application number
PCT/KR2006/001749
Other languages
English (en)
Inventor
Do-Youn Kim
Do-Yang Jung
Original Assignee
Lg Chem, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Chem, Ltd. filed Critical Lg Chem, Ltd.
Priority to CN2006800163125A priority Critical patent/CN101176234B/zh
Priority to EP06757685A priority patent/EP1889325B1/fr
Priority to JP2008508763A priority patent/JP4782192B2/ja
Publication of WO2006121289A1 publication Critical patent/WO2006121289A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3828—Arrangements for monitoring battery or accumulator variables, e.g. SoC using current integration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G01R31/387—Determining ampere-hour charge capacity or SoC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a method of estimating a state of charge of battery, and more particularly to a method of estimating a state of charge of a battery for a hybrid-electric vehicle, which can further accurately estimate the state of charge of the battery in consideration of changes of parameters having an effect on the state of charge, when the vehicle is driven and when a vehicle is not driven, respectively.
  • the terminal voltage between a positive electrode and a negative electrode when a terminal voltage between a positive electrode and a negative electrode is gradually reduced to a certain limitation during the procedure of a discharge, the terminal voltage is rapidly lowered to a discharge stopping voltage, so that the battery loses a discharging capability.
  • the electrode plate which generates electricity, chemically reacts on the electrolyte and is damaged, so that the battery loses its functions as a condenser.
  • the electric vehicle can be driven in proportion with the charging capability of the battery.
  • the electric vehicle generates electricity using the rotation force of the driving wheels while driving, and then recharges the battery. Meanwhile, if the battery is completely discharged during the driving of the electric vehicle, it is difficult to recharge the battery. Thus, it is important to check an accurate state of charge of the battery while the electric vehicle is driving. However, it is difficult to measure the accurate state of charge of the battery, like a fuel gauge of the conventional vehicle, because of irregular characteristic of the battery (which may be changed according to temperature and discharging, etc.).
  • the methods for checking the state of charge of a battery includes a method for identifying the state of charge of a battery using the voltage of the battery and a method for identifying the state of charge of a battery using a discharging capability, which are commercially used.
  • the voltage decreases according to the discharging of the battery. Specifically, the voltage is instantaneously lowered regardless of the state of charge while the vehicle is rapidly accelerated. Accordingly, there is a limitation in checking the state of charge of the battery in the vehicle.
  • the second method since the available state of charge of the battery is changed depending on loading conditions, for example, what constant velocity in Km/h a vehicle drives, or whether or not the vehicle is driven in the city, an algorithm to identify the state of charge of the battery, becomes very complicated.
  • the state of charge of the battery is generally estimated with reference to an open circuit voltage (OCV) before the vehicle is driven.
  • OCV open circuit voltage
  • Such an estimation of the state of charge of the battery presupposes that the open circuit voltage does not change according to an environment.
  • the state of charge of the battery cannot be accurately estimated.
  • high electric current is repeatedly charged and discharged. Therefore, the charged and discharged electric current is integrated for a desired time and then the integrated value is divided by a total capacity of the battery, so that the changed state of charge of the battery can be obtained.
  • the output and the total capacity of the battery decrease according to the charging and discharging cycles, the state of charge of the battery is changed.
  • a method of estimating the state of charge of the battery in consideration of the change of the total capacity and the output of the battery has been not developed yet.
  • the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an apparatus and a method for estimating an accurate state of charge, which can measure a change of temperature and an open circuit voltage so as to estimate the state of charge at an initial time when a vehicle is not driven, and while measuring a decrement of a capacity in the battery depending on charging and discharging of the battery when the vehicle is driven.
  • a method of estimating a state of charge of a battery which includes the steps of: measuring temperature in an initial estimation of the state of charge; measuring an open circuit voltage; obtaining parameters indicating a change of the open circuit voltage according to a change of temperature; and calculating the state of charge using the parameters and the open circuit voltage which is measured depending on the obtained parameters .
  • the method further includes the steps of: measuring electric current in order to integrate the electric current during an estimation of the state of charge after an initial time; calculating a decrement in capacity of the battery according to cycles; and estimating the state of charge by dividing a value, which is obtained by integrating electric current, by the decrement in the capacity of the battery according to the cycles .
  • an apparatus for estimating a state of charge of a battery which includes: a temperature sensor for measuring temperature; a memory for storing parameters indicating a change of an open circuit voltage according to a change of temperature; a voltage meter for measuring the open circuit voltage; and a controller which measures the temperature and the open circuit voltage through the temperature sensor and the open circuit voltage meter during an initial estimation of the state of charge of the battery and obtains the parameters, which indicate the change of the open circuit voltage according to the change of temperature, from the memory, so as to calculate the state of charge of the battery using the parameters and the open circuit voltage measured according to the obtained parameters .
  • the apparatus further includes a current meter for measuring electric current, wherein the controller measures electric current through the current meter in order to integrate the electric current during an estimation of the state of charge after an initial time, calculates a decrement of capacity of the battery according to cycles, and estimates the state of charge by dividing a value, which is obtained by integrating electric current, by the decrement in the capacity of the battery according to the cycles.
  • FIG. 1 is a graph illustrating a correlation of a state of charge and an open circuit voltage.
  • FIG. 2 is a graph showing a Sigmoidal curve.
  • FIG. 3 is a graph illustrating a change of the correlation of the state of charge and the open circuit voltage according to a change of temperature.
  • FIGS. 4 to 7 are graphs illustrating characters of parameters according to a change of temperature.
  • FIG. 8 is a graph illustrating a decrement in the capacity of the battery according to cycles .
  • FIG. 9 is a block diagram illustrating an apparatus for estimating the state of charge according to the preferred embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating a method of estimating the state of charge according to the preferred embodiment of the present invention.
  • FIG. 11 is a graph illustrating the estimation of the state of charge according to the preferred embodiment of the present invention.
  • the state of charge of the battery is estimated through an open circuit voltage.
  • the conventional art has estimated the state of charge without consideration of the change of the open circuit voltage depending on temperature, assuming that the open circuit voltage has a fixed value .
  • the present invention estimates an initial state of charge depending on temperature and a change of an open circuit voltage according to a change of temperature, which have an effect on a charge state of the battery. Then, the present invention estimates a state of charge allowing for a reduction of a total capacity of the battery according to a charging and discharging cycles, while a vehicle drives, thereby accurately estimating the state of charge.
  • a curve representing the correlation of the open circuit voltage and the state of charge is similar to a sigmoidal curve having two asymptotes at upper and lower portions in FIG. 2.
  • the curve of FIG. 1 can be expressed by a following eguation (1) :
  • y represents a state of charge
  • x indicates an open circuit voltage
  • a is an upper asymptote
  • b is a parameter for indirectly determining an inflection point
  • c is a scaling factor
  • d is a position of an inflection point relating to an axis of x.
  • a graph shown in FIG. 3 can be obtained when the change of the open circuit voltage and the state of charge according to the change of temperature is measured.
  • the upper asymptote a, the inflection points b and d, and the scaling factor c can be changed according to the temperature .
  • FIG. 4 shows the change of the upper asymptote a according to the change of temperature.
  • FIG. 5 shows the change of the inflection point b according to the change of temperature.
  • FIG. 6 shows the change of the scaling factor c according to the change of temperature, and
  • FIG. 7 shows the change of the inflection point d according to the change of temperature .
  • the upper asymptote a, the inflection points b and d, and the scaling factor c according to the change of temperature as shown in FIGS. 4 to 7 are stored in a memory so as to correspond to the temperatures respectively, and be used for calculating the state of the charge.
  • the upper asymptote a, the inflection points b and d, and the scaling factor c according to the change of temperature can be realized by an equation using the graphs as shown in FIGS. 4 to 7
  • SOCk- 1 is a previous SOC.
  • the initial SOC is calculated by the equation 1, the initial SOC is used as SOC k -i.
  • the previous SOC is used as SOC k _i.
  • E cha is a charging efficiency
  • E dch is a discharging efficiency.
  • I Cha is a charged current
  • I dch is a discharged current
  • t is time.
  • Ci n i t is an initial capacity of the battery
  • F c (cycle) indicates the decrement in the capacity of the battery according to cycles.
  • the SOC is divided by the decrement of the capacity of the battery according to the cycles in a general manner of integrating the charging and discharging current.
  • the SOC should be reduced according to the decrement in the capacity of the battery according to the cycles.
  • the present invention compensates for the decrement of the capacity of the battery according to repeated charging and discharging cycles, so as to further increase the accuracy for the estimation of the state of charge.
  • the decrement in the capacity of the battery Fc (cycle) according to the cycles can be represented with a graph, based on experimental data with respect to an accumulated discharging capacity and the decrement of the capacity of the battery, as shown in FIG. 8.
  • the decrement in the capacity of the battery according to the cycles can be expressed by a following equation (3) using the graph shown in FIG. 8.
  • d is an accumulated charging capacity and is within a range of [0, 33330] .
  • d is changed into a value with a range of [-1, 1] and input into the function .
  • Equation (3) can be detailed and expressed by a following equation (4 ) :
  • a controller 100 generally controls a battery, and also calculates an initial state of charge and the state of charge in a vehicle driving, according to the preferred embodiment of the present invention.
  • a memory 102 stores a variety of information including a processing program of the controller 100. Specifically, the memory 102 stores the state of charge calculated according to the preferred embodiment of the present invention, parameters a, b, c and d depending on temperature, the accumulated discharging capacity d, the charging efficiency E Ch a r the discharging efficiency E ⁇ chr the charged current I Chaf the discharged current Idch, the time t, and the initial capacity Ci nIt of the battery.
  • An current meter 104 measures current in order to calculate the state of charge in the vehicle driving, and provides the value to the controller 100.
  • a temperature sensor 106 detects temperature in order to calculate an initial state of charge, and provides a result to the controller 100.
  • a unit 108 for measuring the open circuit voltage measures the open circuit voltage in order to calculate the initial state of charge, and provides the result to the controller 100.
  • the controller 100 checks if the vehicle drives (step 202) when an estimation of the state of charge is required to manage an external device or a battery (step 200) .
  • the controller 100 receives information relating to the driving state of the vehicle from a control apparatus of the vehicle, or checks the driving state based on the use of the battery. If the vehicle is not driven, the controller 100 determines that the vehicle is in an initial state, and starts a process for estimating the initial state of charge.
  • the controller 100 measures the temperature through the temperature sensor 106 in order to estimate the initial state of charge, and then reads the parameters corresponding to the measured temperature from the memory 102 (step 204) .
  • the parameters includes the upper asymptote a, the inflection points b and d, and the scaling factor c which are used for estimating the state of charge by using the equation (1) .
  • the controller 100 When the controller 100 completes reading the parameters corresponding to the measured temperature, the controller 100 measures the open circuit voltage using the unit 108 for measuring the open circuit voltage (step 206) . When the measurement of the open circuit voltage is completed, the controller 100 calculates the initial state of charge using the parameters corresponding to the temperature, and the measured open circuit voltage according to the equation (1) (step 208) . When the initial state of charge has been calculated, the controller 100 stores the calculated initial state of charge in the memory 102 (step 210) .
  • the controller 100 measures the electric current by using the current meter 104 (step 212) .
  • the controller 100 reads the accumulated discharging capacity d from the memory 102 and calculates the decrement in the capacity of the battery according to cycles by using the equation (3) (step 214) .
  • the controller finishes calculating the decrement in the capacity of the battery according to the cycles, and then calculates the state of charge of the driving vehicle by using the initial or previous state of charge, the measured electric current, and the decrement in the capacity of the battery according to the cycles, based on the equation (2) . Finally, the controller 100 stores the calculated state of charge in the memory (102) (step 216) .
  • FIG. 11 is a graph illustrating an example of the state of charge with relation to the open circuit voltage obtained by using the method for estimating the state of charge at a temperature of 25 " C in which a maximum error of the state of charge is about 3.6%.
  • the maximum error is within an allowable range.
  • the present invention estimates the state of charge using the open circuit voltage at an initial state when the vehicle is not driven, and compensates for the change of temperature, it is possible to estimate the state of charge at a certain temperature.
  • the present invention compensates for the decrement of the capacity of the battery in which the capacity of the battery is reduced according to the charging and discharging cycles, as well as the temperature compensation, thereby further accurately estimating the state of charge.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Dispositif et procédé d'estimation précise de l'état de charge d'une batterie, permettant de mesurer un changement de température et une tension en circuit ouvert, et d'apprécier un état de charge initial lorsqu'un véhicule est à l'arrêt, et de mesurer une baisse progressive de la capacité de la batterie en fonction de la charge et de la décharge de cette dernière pendant la conduite. Ce procédé englobe les opérations suivantes: mesure de la température lors d'une estimation initiale de l'état de charge; mesure d'une tension en circuit ouvert; collecte de paramètres indiquant un changement de la tension en circuit ouvert en fonction d'un changement de température; et calcul de l'état de charge au moyen des paramètres et de la tension en circuit ouvert mesurée d'après les paramètres recueillis. Le procédé consiste en outre: à mesurer le courant électrique dans le but de l'intégrer dans une estimation de l'état de charge après l'état initial; à calculer une baisse progressive de la capacité de la batterie en fonction des cycles; et à estimer l'état de charge, ceci en divisant une valeur obtenue par intégration du courant électrique par la baisse progressive de la capacité de la batterie en fonction des cycles.
PCT/KR2006/001749 2005-05-11 2006-05-10 Procede d'estimation de l'etat de charge d'une batterie pour vehicule electrique hybride WO2006121289A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2006800163125A CN101176234B (zh) 2005-05-11 2006-05-10 估计混合电动车的电池的soc的方法
EP06757685A EP1889325B1 (fr) 2005-05-11 2006-05-10 Procede d'estimation de l'etat de charge d'une batterie pour vehicule electrique hybride
JP2008508763A JP4782192B2 (ja) 2005-05-11 2006-05-10 ハイブリッド車両用バッテリーの充電状態推定方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2005-0039335 2005-05-11
KR20050039335 2005-05-11

Publications (1)

Publication Number Publication Date
WO2006121289A1 true WO2006121289A1 (fr) 2006-11-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2006/001749 WO2006121289A1 (fr) 2005-05-11 2006-05-10 Procede d'estimation de l'etat de charge d'une batterie pour vehicule electrique hybride

Country Status (7)

Country Link
US (1) US7679327B2 (fr)
EP (1) EP1889325B1 (fr)
JP (1) JP4782192B2 (fr)
KR (1) KR100759706B1 (fr)
CN (1) CN101176234B (fr)
TW (1) TWI332724B (fr)
WO (1) WO2006121289A1 (fr)

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KR100759706B1 (ko) 2005-05-11 2007-09-17 주식회사 엘지화학 하이브리드 차량용 배터리의 충전상태 추정 방법
EP1975636A3 (fr) * 2007-03-26 2011-03-16 Sanyo Electric Co., Ltd. Procédé de détection de la capacité d'une batterie à pleine charge
CN101212071B (zh) * 2006-12-31 2011-07-06 比亚迪股份有限公司 一种动力电池荷电状态估计方法
EP2108972A3 (fr) * 2008-04-11 2012-01-25 Furukawa Electric Co., Ltd. Procédé de detection de l'état d'une batterie
CN102331560A (zh) * 2011-05-16 2012-01-25 中国科学院上海微系统与信息技术研究所 一种镍氢电池荷电态的估算方法
CN102347517A (zh) * 2011-06-29 2012-02-08 重庆长安汽车股份有限公司 一种寿命状态自适应型soc估算方法及系统
CN102916462A (zh) * 2011-08-04 2013-02-06 通用汽车环球科技运作有限责任公司 电池充电系统和方法
CN101688899B (zh) * 2007-08-22 2013-06-19 株式会社Lg化学 用于估计电池的开路电压的装置和用于估计电池的充电状态的装置以及相应的控制方法
CN107085187A (zh) * 2017-04-13 2017-08-22 华北电力科学研究院有限责任公司 梯次利用电池储能系统一致性维护指标的确定方法及装置
EP3252854A1 (fr) * 2012-04-13 2017-12-06 LG Chem, Ltd. Système de batterie pour batterie secondaire comprenant un matériau de cathode mélangé et appareil et procédé de gestion correspondant
DE102012108574B4 (de) * 2011-09-15 2017-12-14 Mediatek Inc. Systeme und Verfahren zur Bestimmung einer verbleibenden Batteriekapazität einer Batterievorrichtung
US10042004B2 (en) 2015-02-12 2018-08-07 Mediatek Inc. Apparatus used with processor of portable device and arranged for performing at least one part of fuel gauge operation for battery by using hardware circuit element(s) when processor enter sleep mode
CN118759382A (zh) * 2024-09-05 2024-10-11 宁德时代新能源科技股份有限公司 荷电状态确定方法、电子设备及存储介质

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KR100804697B1 (ko) * 2006-08-11 2008-02-18 삼성에스디아이 주식회사 배터리 관리 시스템 및 그의 구동 방법
TWI316609B (en) * 2006-12-26 2009-11-01 Shun Hsing Wang A method of calculating remaining capacity of rechargeable battery
US7899631B2 (en) * 2007-03-29 2011-03-01 The Furukawa Electric Co., Ltd. Method and device for estimating battery residual capacity, and battery power supply system
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US20060261782A1 (en) 2006-11-23
TWI332724B (en) 2010-11-01
US7679327B2 (en) 2010-03-16
JP2008541012A (ja) 2008-11-20
EP1889325B1 (fr) 2013-01-23
CN101176234A (zh) 2008-05-07
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CN101176234B (zh) 2010-10-13

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